RICE UNIVERSITY IMAGE: SCANNING ELECTRON MICROSCOPE IMAGES BY RICE UNIVERSITY ENGINEERS SHOW THE EFFECTS OF HEAT ON THE FILTER LAYER OF A SURGICAL FACEMASK. THE CENTER IMAGE SHOWS THE POLYMER FILTER AFTER DECONTAMINATION AT 70 DEGREES CELSIUS FOR 30 MINUTES. THE RIGHT IMAGE SHOWS THE MELTED LAYER AFTER EXPOSURE TO 160 C FOR TWO MINUTES....
